XI PHENOMENA OF ORGANIC NATURE 315 
long run, converted into carbonic acid, into water, 
and into ammonia. You will now, perhaps, under- 
‘stand the curious relation of the animal with the 
plant, of the organic with the inorganic world, 
which is shown in this diagram. 
Inorganic World 
CARBONIC ACID. WATER. AMMONIA. SALINES. 
LZ 
PROTE \ ges 
fe Sf CARBONIC AC/D 
[AMYLACEOUS MATTERS 
FATS 
SALINES gr aes 
\ WATER 
SALINES 
_ 
Vegetable World Fig.3. Animal Worid 
The plant gathers these inorganic materials 
together and makes them up into its own 
substance. The animal eats the plant and appro- 
priates the nutritious portions to its own susten- 
ance, rejects and gets rid of the useless matters ; 
and, finally, the animal itself dies, and its whole 
body is decomposed and returned into the inorganic 
world. There is thus a constant circulation from 
one to the other, a continual formation of organic 
life from inorganic matters, and as constant 
a return of the matter of living bodies to the 
inorganic world; so that the materials of which 
